A thresher is a machine used in agriculture to separate grains from their stalks and husks. This process, known as threshing, is essential for harvesting crops like wheat, barley, and rice. Threshers can be powered by various sources, including tractors or electricity, and they help increase efficiency in the harvesting process. Modern threshers come in different types, such as combine harvesters, which perform multiple functions, including cutting, threshing, and cleaning the grain in one operation. The invention of the thresher has significantly improved crop production and reduced the labor required for harvesting, making it a vital tool in farming today.